ABSTRAK Penelitian ini bertujuan untuk memperoleh data mengenai jenis jamur berpotensi entomopatogen yang dikoleksi dari sarang rayap di Kawasan Alur Mancang Ekosistem Seulawah. Penelitian telah dilaksanakan selama tujuh bulan dimulai dari Februari hingga Agustus 2016. Lokasi pengambilan sampel jamur dari sarang rayap dilakukan di Kawasan Alur Mancang dan diidentifikasi di Laboratorium Zoologi dan Laboratorium Mikrobiologi Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) Unsyiah. Metode penelitian yang digunakan adalah Metode Standardized Sampling Protocol untuk menemukan sarang rayap yang ditumbuhi jamur. Hasil yang diperoleh dari penelitian ini menunjukkan bahwa ditemukan adanya tiga sarang rayap yang ditumbuhi jamur, yaitu sarang arboreal, sarang kayu lapuk, dan sarang kayu mati. Hasil uji sifat patogenitas jamur yang dikoleksi dari sarang arboreal menunjukkan bahwa rayap Coptotermes sp. sangat rentan terhadap isolat jamur marga Aspergillus. Berdasarkan karakteristik morfologi koloni dan konidium, jenis jamur berpotensi entomopatogen tersebut diduga sebagai Aspergillus flavus. Kata kunci : Aspergillus flavus, jamur entomopatogen, Coptotermes sp., Kawasan Alur Mancang ABSTRACT The purpose of this study is to inventory of fungi that collected from nests and its potential as entomopathogenic at Alur Mancang, Seulawah Ecosystem. Research was conducted for seven months, from February to August 2016. The fungi from the nests were collected in Alur Mancang, then identifying and testing pathogenicity was conducted at Zoology Laboratory and Microbiology Laboratory at Faculty of Mathematics and Natural Science (FMIPA), Syiah Kuala University. Standardized Sampling Protocol Method was adopted to find a number of termite nests. The result from this research was found three nests which grown by fungi, which are arboreal nest, rotten wood nest, and dead wood nest. Laboratory study have shown that Coptotermes sp. is highly susceptible to potentially entomopathogenic fungi from Aspergilus that collected from arboreal nest. Based on morphological characteristics of colony and conidia, this fungi was suspected as Aspergillus flavus. Key words : Aspergillus flavus, entomophatogenic fungi, Coptotermes sp., Alur Mancang’s Region